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Form infrastructure for Astro. Zod validation, email, rate limiting, Turnstile, GDPR, Sheets. FAIL = no conversion.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name astro-forms
description Form infrastructure for Astro. Zod validation, email, rate limiting, Turnstile, GDPR, Sheets. FAIL = no conversion.

Astro Forms Skill

Form infrastructure. Backend only. UI is separate.

Purpose

Server-side form handling. Validation, email, storage, spam protection.

Output

form_ready: true
data_contract: [lead_id, source_page, timestamp, gdpr_consent]
post_submit_flow: [email, thank_you, analytics]
conversion_verdict: PASS | WARN | FAIL

Primary Conversion Declaration

One form per page is THE conversion.

primary_conversion:
  type: form
  id: "contact-form"
  page: "/contact"

All other forms are secondary (newsletter, etc.).

Page Exclusion Rules

Page Type Forms Allowed
landing ✅ Primary only
service ✅ Primary only
calculator ❌ Use calculator skill
thank-you ❌ Forbidden
404 ❌ Forbidden

Form on forbidden page = FAIL.

Data Integrity Contract

Every submission MUST contain:

data_contract:
  required:
    - lead_id          # Unique, generated
    - source_page      # URL where submitted
    - timestamp        # ISO datetime
    - gdpr_consent     # true + timestamp
    - ip_hash          # Anonymized
  optional:
    - utm_source
    - utm_medium
    - utm_campaign

Missing required field = submission invalid.

Post-Submit Flow Contract

All three MUST happen:

post_submit_flow:
  1_confirmation_email: required
  2_thank_you_redirect: required
  3_analytics_event: required
Step What FAIL if
Email Confirmation to customer Not sent
Thank You Redirect to /thank-you No redirect
Analytics GTM event fired No event

Any missing = FAIL.

Progressive Disclosure

Personal data only AFTER value established.

Step Can Ask
1 Service type, location
2 Details, preferences
3+ Name, email, phone

Email on step 1 = WARN. GDPR and CRO critical.

Core Features

Feature Implementation
Validation Zod server-side
Email Resend → Brevo fallback
Rate limit Cloudflare KV
CAPTCHA Turnstile (invisible)
Storage Google Sheets
Spam Honeypot + time-check
GDPR Required checkbox + timestamp

Spam Protection (All Required)

spam_protection:
  honeypot: true          # Empty field trap
  time_check: 3000ms      # Min fill time
  turnstile: true         # Cloudflare CAPTCHA
  rate_limit: 5/hour/ip   # KV-based

Any missing = WARN.

GDPR Consent

gdpr:
  checkbox_required: true
  timestamp_stored: true
  text: "Elfogadom az adatvédelmi szabályzatot"
  link: "/privacy-policy"

Missing checkbox or timestamp = FAIL.

Conversion Verdict

conversion_verdict: PASS | WARN | FAIL
issues: []
Condition Verdict
Form on forbidden page FAIL
Missing data contract field FAIL
Post-submit flow incomplete FAIL
GDPR missing FAIL
Spam protection incomplete WARN
Email on step 1 WARN
All pass PASS

FAIL States

Condition
Form on thank-you page
Missing lead_id/timestamp
No confirmation email
No thank-you redirect
No GTM event
GDPR checkbox missing

WARN States

Condition
Honeypot missing
Time-check missing
Personal data on step 1
Rate limiting not configured

Environment Variables

RESEND_API_KEY=re_xxxxx
BREVO_API_KEY=xkeysib-xxxxx
GOOGLE_SHEETS_WEBHOOK_URL=https://...
TURNSTILE_SITE_KEY=0x...
TURNSTILE_SECRET_KEY=0x...

References

Definition of Done

  • Primary conversion declared
  • Data contract fields all present
  • Post-submit flow complete (email + thank-you + event)
  • GDPR checkbox + timestamp
  • Spam protection configured
  • Progressive disclosure followed
  • conversion_verdict = PASS